Taxpayer Identification Number - TIN


DEFINITION of 'Taxpayer Identification Number - TIN'

A number that is assigned to a tax paying businesses for identification and record keeping purposes. The TIN number allows the IRS to keep track of all taxpaying entities and manage their accounts. Corporations, estates and trusts must file their taxes under this number each year.

BREAKING DOWN 'Taxpayer Identification Number - TIN'

For firms, the TIN number is their Social Security number equivalence. For corporations, this number is their EIN (Employer Identification Number). Estates, trusts and partnerships use EINs as well.

  1. Government Accountability Office ...

    A department of the U.S. government that monitors and audits ...
  2. Employer Identification Number ...

    A unique identification number that is assigned to a business ...
  3. Income Tax

    A tax that governments impose on financial income generated by ...
  4. Corporation

    A legal entity that is separate and distinct from its owners. ...
  5. Finance

    The science that describes the management, creation and study ...
  6. Estate

    All of the valuable things an individual owns, such as real estate, ...
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